sedimentary

Polychrome Jasper (Desert Jasper)

Silicon dioxide with mineral inclusions (SiO2)

AI-generated identification · may be incorrect

Hardness: 6.5 - 7 on the Mohs scale; Color: Swirled grey, tan, yellow, cream, and reddish-brown; Luster: Vitreous to waxy when polished; Crystal structure: Trigonal (microcrystalline/cryptocrystalline); Cleavage: None (conchoidal fracture); Specific gravity: ~2.6 - 2.8.

Hardness: 6
Color: Swirled grey, tan, yellow, cream, and reddish-brown
Luster: Vitreous to waxy when polished

Identified October 3, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed through the deposition of silica-rich solutions within volcanic or sedimentary environments, heavily pigmented by various iron oxides and clay minerals during percolation and solidification.

Uses & applications

Predominantly used for ornamental carvings (such as spheres and eggs), decorative display pieces, lapidary cabochons, and in metaphysical or crystal collections.

Geological facts

Polychrome Jasper, also commonly marketed as Desert Jasper, was relatively recently discovered around 2006 in the desert regions of Madagascar. It is named for its vibrant, multihued swirl and flame-like banding.

Field identification & locations

Identifiable by its high polish, dense cryptocrystalline quartz hardness (cannot be scratched with a standard steel nail), and vivid multi-colored, swirling opaque patterns. High-quality deposits are primarily found in Madagascar.